Lm. Bull et al., A NEUTRON-DIFFRACTION STUDY OF ACID SITES IN H-SAPO-37, Journal of the Chemical Society, Chemical Communications, (15), 1993, pp. 1196-1198
A powder neutron diffraction study of H-SAPO-37 (Fd3; a = 24.804(2) an
gstrom; R(p) = 2.98%, R(wp) = 3.73%, chi2 = 1.966) reveals Al/P altern
ation in the framework, with Si substituting for P; protonation, in or
der of decreasing occupancy, is observed at O(1), O(2) and O(3).